67 lines
2.4 KiB
Python
67 lines
2.4 KiB
Python
#
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# Copyright 2014 Red Hat, Inc
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#
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# Licensed under the Apache License, Version 2.0 (the "License"); you may
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# not use this file except in compliance with the License. You may obtain
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# a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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# License for the specific language governing permissions and limitations
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# under the License.
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from oslo_config import cfg
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import six
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# Below config is for collecting metadata which user defined in nova or else,
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# and then storing it to Sample for future use according to user's requirement.
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# Such as using it as OpenTSDB tags for metrics.
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OPTS = [
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cfg.ListOpt('reserved_metadata_namespace',
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default=['metering.'],
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help='List of metadata prefixes reserved for metering use.'),
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cfg.IntOpt('reserved_metadata_length',
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default=256,
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help='Limit on length of reserved metadata values.'),
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cfg.ListOpt('reserved_metadata_keys',
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default=[],
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help='List of metadata keys reserved for metering use. And '
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'these keys are additional to the ones included in the '
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'namespace.'),
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]
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cfg.CONF.register_opts(OPTS)
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def add_reserved_user_metadata(src_metadata, dest_metadata):
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limit = cfg.CONF.reserved_metadata_length
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user_metadata = {}
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for prefix in cfg.CONF.reserved_metadata_namespace:
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md = dict(
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(k[len(prefix):].replace('.', '_'),
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v[:limit] if isinstance(v, six.string_types) else v)
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for k, v in src_metadata.items()
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if (k.startswith(prefix) and
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k[len(prefix):].replace('.', '_') not in dest_metadata)
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)
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user_metadata.update(md)
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for metadata_key in cfg.CONF.reserved_metadata_keys:
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md = dict(
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(k.replace('.', '_'),
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v[:limit] if isinstance(v, six.string_types) else v)
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for k, v in src_metadata.items()
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if (k == metadata_key and
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k.replace('.', '_') not in dest_metadata)
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)
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user_metadata.update(md)
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if user_metadata:
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dest_metadata['user_metadata'] = user_metadata
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return dest_metadata
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